| isri.org | Institute of Scrap Recycling Industries |
| awma.org | Air & Waste Management Association (A&WMA ) |
| iswa.org | International Solid Waste Management Association (ISWA) |
| fead.be | European Federation of Waste Management and Environmental Services |
| envasns.org | Environmental Industry Interactive (EII) |
| costha.com | Conference on Transportation of Hazardous Articles (COSTHA) |
| astswmo.org | Association of State and Territorial Solid Waste Management Officials (ASTSWMO) |
| asiwpca.org | Association of State and Interstate Water Pollution Control Administrators (ASIW |
| asdwa.org | ASDWA - Association of State Drinking Water Administrators |
| amsa-cleanwater.org | Association of Metropolitan Sewerage Agencies (U.S.) |
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